Carbureter.



PATENTED JUNE Q, l908. H. RICHARDSON.

CARBURETER.

APPLICATION FILED MAR. 1s, 1907.

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jreters, of which the HENRY RICHARDSON, OF WALTl-AM, MASSACHUSETTS.

CARBURETER.

Specification of Letters Patent.'

Patented .Tune 9, 1908.

Application led. March 16, 1907. Serial No. 362,719.

To all whom it may concern:

Be it known that l, HENRY RICHARDSON, of Valtham, in the county of Middlesex and State of Massachusetts, haveinvented certain new and useful Improvements in Carbufollowing is a specification.

This invention relates to carbureters. More particularly, it relates to apparatus for mixing air with gasolene, alcohol or other hydrocarbon,

I elevation of adetail.

' panying for combustion .within an engine; and for conveniently regulating the amount ofthe mixture admitted to the engine.

It comprises improvements in the construction of such apparatus, as hereinafter described, reference being had to the accomdrawings, in which Figure 1 is an elevation of apparatus embodying the invention, sectioned on the plane 1-1 of Fig. 2, looking in the direction of the arrows; and Fig. 2 is an elevation of the same apparatus, sectioned on the plane looking in the direction of the arrows. ig. 3 is a plan of the same, arranged l'ike Fig. 2. Fig. 4 is an enlarged Fig. 5 is an enlarged v elevation showing an arrangement of certain ber. '35

, other parts.

Referring to the drawings: 10 is an air inlet pipe, 11 is an'inlet' pipe for the ygasolen'e or other hydrocarbon, and 12 is a passage leading from the apparatus to the combustion chamlVithin the apparatus is a chamber divided into two portions 13 and 14, separated by a valve 15 which is normally held against its seat by a spring 19. This valve has an external annular seat 16 and an internal annular seat 17, within which is a needle-valve of any suitable design and here represented by -4 the screw-mounted needle 1'8", the end of which is conical and adapted to fit aconical seat 20. This valve may be adjusted to any desired degree of opening by the external handle 21.v

Gasolene entering through pipe .l1 passes through assage 22 to the needle valve. When va ve 15 is closed air cannot escape from the portion 13 of the chamber, nor can gasolene escape from the passage 22; but when ythe suction of the engine, or other cause, raises valve v15 from its seat air and gasolene both are drawn through into chamber'14 and thence out through 12 to the engine. The stem 23 of valve 15 is guided in a central hole through aprojection 24 from the cap25 `closing the upper part 14 of the chamfor controlling the proportions thereof the means of fastening the auxiliary cap 28.

ber. The end 26 of this projection 24 constitutes a stop limiting the upward movement of the valve 1 5; but a readily adjustable auxiliary stop 27 is provided mounted on an au-X- iliary cap 28, which One feature of the invention relates to this stop 27 and its connected parts. The cap 25 has an axial external projection 29 on which is a helical cam 30 projecting radially therefrom. The auxiliarjT cap 28 is supported thereon and is adjusted toward and from the apparatus by adjusting its position on this cam, which may be done by .means oflever 31 which may be connected at 32 to a control arm located at any place convenient to the operator of the engine. The auxiliary cap is maintained ixedly in whatever position it may be adjusted to by a friction block 33, pressed by aV spring 34 with an intensity of pressure adjustable by screw 35 against a side surface 36 of the cam or by some other surface of the projection 29, Bythis arrangement the stop 27 is placed in any desired position by the operator by means of control closes the central bore 4through cap 25 1n which valve' stem 23 plays.

arm 31, and wherever placed it limits the degree of openin of valve 15, thus controlling the amount o mixed hydrocarbon and air which can pass throu h said valve during the period of time the va ve remains open The cam is arranged at such a pitch that theentire movement of the cap between the extreme outward position of the stop 27 and its extreme inward position in which it is seated against the top end of'valve stem 23, holding the valve closed, occupies an arc of about one hundred and twenty degrees, so that this entire adjustment is effected by pushing the arm 31 forward or back withoutl theneed of rotary connections or caring. f

Another feature of the invention relates to spring-mounted parts in place. The spring thevalve at one end and the cap 25 at the other end by having its inal coil embedded in grooves 37, formed annularly in the part to which the spring is attached. In each case there is a lip 38 which retains the spring, but which the spring can ass over, by bending elasticallyV when pus ed or pulled with sufficient force. ln the case o f spring 19 this holds the valve elastically attached to cap-25 and readily removable therefrom. A simi-v lar fastening 'may be'used with spring 39, attaching the auxiliary stop 27 elastically to the The` form ofv the stop 27 19 is attached to is illustrated in Fig.

whenfprepared for attachment tothe spring 'l g 5 where the groove 37 is i seenfbetween the head 27 and the Aretainingl lip 38. l

In operation the arm'31 may be fastened amping screw.40 upon the'exterior of the auxiliary cap 28. As the cam 30 has upy the openingfof the valve, said stop being-at a sired per and lower faces each engaging the cap 28, movement of lever 31, either forward or back, adjusts this cap up or down, moving the stop 27 correspondingly with respect to the main valve seat, and thus adjusting the degree to. which valve 15 opens.

- I claim:

1.1In a carbureter the .combination of an automatically closing valve and an elastically mounted adjustable stop therefor, limiting,

distance from'the closed position and engaging the valveonly when ther valve` isjopen.

f 2. .In a carbureter, in combination, a valve adapted to close downward j" a relatively weak spring pressing it constantly toward its closed position and a relatively strong spring acting in the same direction and normally cam of steep pitch an disen aged, positioned-to enga e it at the de- Ilmit of itsupward trave 3. In a carbureter, in combination, a valve adapted to close downward; a spring sus- I pended above it, normally not engaged 30` varying distances from the closed position of' i the valve.

4. In a carbureter, 1n combinatlon, a valve ldownward; the upper art adapted to close of t e carbureter havin externally a he ical dg internally a hollow axial space, a cap iitting externally thereon closing the hollow s ace, 'and engaging the cam; and a spring epending from the cap inte said hollow,l in position to engage, and limit the lift of, the valve.

In a carbureter, in combination, a valve adapted to close downward; a helical spring depending above it, limiting its opening; and 'a buffer held by the spring at'its lower end; there being in the art joined to the spring a circular groove whpich the finalconvolution of the spring ats elastieally, thereby holding fi said part and the spring together detachably-f In testimony'w ereof hereto aflix my Y signature, in presence of two witnesses.

Y HENRY RICHARDSON.

Witnessesr j EVERETT E. KENT, M. E. MURPHY. 

